Select the most appropriate option that can substitute the underlined words in the given sentence.
The road is too busy for elderly people that they cannot cross safely.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. to cross safely.
Too busy is a degree modifier (an adverbial phrase) describing the adjective "busy."
In English, we use the too...for...to infinitive construction to express that something is beyond the capacity or suitability of someone or something to act upon it.
Example: "The box is too heavy for her to lift."
Hence, the correct sentence: The road is too busy for elderly people to cross safely.